Features: 1.Waterproof material, using water?repellent film to protect your LED screen can work even in rain. 2.Powered by mobile power supply, customize backpack LED screen content through APP. 3.S?shaped adjustable shoulder strap, shoulder strap designed and padded shoulder strap can effectively share weight and travel easily. 4.Ergonomic backpack and back wrapping designed can effectively relieve shoulder pressure and travel easily. 5.Multi?angle expansion, user?friendly access, multi?functional storage bag designed, so that storage is clear at a glance. 6.Buzz heat dissipation designed, multiple storage space, thick and comfortable hand?held, high?quality metal zipper.specification:Item Type: LED Backpack Optional Color: Black, Pink, Lake Blue Support Points: 64 x 64 full-color dot matrix screen Screen Size: Approx. 25 x 25cm / 9.8 x 9.8in Power Input: 5V/2A Power Supply Mode: Mobile power supply Communication Method: WIFI, GPRS, GPS, 4G Support File Format: Text, picture, GIF animation Backpack Capacity: 20LPackageList:1 x User Manual1 x LED BackpackNotePlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.